I knew of a case where a neighbor of mine was charged with statutory rape. The background was that the girl wrote about it in her personal journal. Her father found it and took it to the police. The police investigated. Turns out he was innocent. The girl had a crush on the guy and was fantasizing. The father owed the guy money. But for the police investigation, yes, the girl did get questioned. Her journal was taken as evidence to help the investigation. She even took a polygraph test. Even some of her friends were questioned because they came up in the journal. The parts that shot holes in her story were many. The friends couldn’t corroborate the stories, the dates/times she claimed they had sex were contradicted by solid evidence that he was somewhere else with many witnesses, and the polygraph test was not conclusive. So for the investigation, yes, the minor will be questioned. As for prosecution, I couldn’t say, though I suspect they COULD be brought onto the stand. Let’s face it, if a minor is at the heart of an issue, the defense, at a minimum, might want to call them to the stand.